Junkhead

Allow a unarmed mounted unit (preferably promoted) to charge through to the C19 Speedwings if he has <23 speed with Amelia's wing. The enemies are likely to prioritise over killing the knights. Syrene might also work.

That way Seth will only require 19 speed to double DK before Amelia's wing and the C19 wing and he can get the chapter done in 3 turns. He could grab it himself,...